Carl, The first place I go to is the mfr's data sheets. From there you could use Dynamic Mechanical Analysis (DMA) to check for CTE and Tg. You might also check the archives noted below. I believe there was a brief string on CTE, etc a year or so ago. Steven Creswick Gentex Corporation Zeeland, MI 49464 -----Original Message----- From: Carlr Ray [mailto:[log in to unmask]] Sent: Thursday, April 24, 2003 11:39 AM To: [log in to unmask] Subject: [TN] Expansion Testing Hello All, What are some of the industry standards for testing thermal and mechanical expansion of undefills and encapsulates? Carl Ray Sr. Manufacturing Engineer Huntsville, AL 35807 Phone: 256-882-4800 ext. 8845 Cell: 256-990-1990 --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------